Leviticus 14:37-42

37and he shall look on the plague, and, behold, if the plague be in the walls of the house with hollow strakes, greenish or reddish, and the appearance thereof be lower than the wall;

38then the priest shall go out of the house to the door of the house, and shut up the house seven days:

39and the priest shall come again the seventh day, and shall look: and, behold, if the plague be spread in the walls of the house;

40then the priest shall command that they take out the stones in which the plague is, and cast them into an unclean place without the city:

41and he shall cause the house to be scraped within round about, and they shall pour out the mortar that they scrape off without the city into an unclean place:

42and they shall take other stones, and put them in the place of those stones; and he shall take other mortar, and shall plaister the house.